[x3d-public] X3D, Blender, and which way is up.

[John Carlson]

On Mon, Nov 25, 2024 at 8:20 AM vmarchetti at kshell.com <vmarchetti at kshell.com>
wrote:

>
>
> The X3D importer/exporter allows through the UI to configure the
> transformation through the choice of Up and Forward. The choices of +Z Up
> and +Y forward  leads to the identity transformation, that is x,y,z
> coordinates are unchanged.  The can be verified  with the model at
> https://drive.google.com/file/d/1lumRBRjqoygHCw88kwzcSKS5M-KxGXLf/view?usp=drive_link ,
> it is a 3.4 MB zip file. When unzipped it has a .x3d file of a sculpture
> head, with the scalp being at the +Y extremity and the sculpture is looking
> in the +Z direction. With +Z up and +Y forward import and export these axes
> are preserved in the imported blender scene and in the re-exported x3d
> scene,
>

I agree that imports and exports probably match up.  What happens when I
present a script to an audience, undoubtedly, someone will say it’s wrong.
Then look at the RGB gizmo and tell me it’s right, halfway in between
import and export.  My motto is, if it works, don’t fix it.  It doesn’t
work for Joe.  It’s a matter of semantics, not functionality.

>
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